MC52i包括了MC35i，MC39i，Tc35i的所有功能，引脚和指令完全兼容MC55/MC56。-MC52i including MC35i, MC39i, Tc35i all the features, pin and instruction compatible MC55/MC56.

单片机Cortex M3 + GPRS模块 MC52，基于高内聚思想写的；-The c source code for GPRS module named MC52, the cpu is cortex M3, and runs no OS.